Push button



FIG. 1 is a perspective view of a push button showing our new design;

FIG. 2 is a top view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is cross a sectional view thereof, taken on line 4--4 in FIG. 2; and,

FIG. 5 is a right view thereof, the left view being substantially a mirror image thereof.

The bottom of the push button not shown in the drawing or described in the specification forms no part of the claimed design. 

The ornamental design for a push button, as shown and described. 